Company History


The origins of Atos

Atos was formed from the merger in 1997 of two French-based IT services companies – Axime and Sligos – each of which had been established out of earlier mergers. By 2000, Atos employed 11,000 staff and generated annual revenues of approximately € 1.1 billion.

Origin was a subsidiary of Royal Philips Electronics, which had been formed in 1996 from the merger of BSO/Origin and Philips Communications. At the time of the merger with Atos in October 2000, Origin employed more than 16,000 staff in 30 countries worldwide and generated annual revenues of approximately € 1.6 billion.

KPMG Consulting’s businesses in the United Kingdom and The Netherlands were acquired in August 2002 to establish Atos Consulting. This transaction provided the Group with a major presence in the Consulting segment of the IT services market.

Sema Group was acquired from Schlumberger in January 2004, thereby creating one of the leading European IT services companies. At the time of the acquisition, Sema Group employed 20,000 staff and generated annual revenues of approximately € 2.4 billion. Atos Origin employed 26,500 staff, generating annual revenues of more than € 3 billion.

On July 1, 2011, Atos announced that it has completed the acquisition of Siemens IT Solutions and Services – to become a new IT champion. The deal created a new company with pro forma 2011 annual revenues of € 8.5 billion and 74,000 employees across 48 countries. Ranked in the top ten global IT services providers; number five in managed services worldwide and the number one European player in Europe, the new company is a powerful combination of two highly complementary organizations. Together as Atos, they create a leader in foundation and business critical IT services that will accelerate growth.

On August 11, 2014, Atos announced the successful completion of the tender offer launched by Atos for all the issued and outstanding shares in the capital of Bull. The transaction represented a key milestone in the creation in Europe of a world leader in Cloud, Cyber-security, and Big Data. The deal created a new company annual revenue of circa €10 billion and 86,000 employees in 66 countries.

On July 1, 2015, Atos announced that it has completed the acquisition of Xerox ITO, of which the business is mainly in the United States. As a result, Atos totals now 93,000 employees across 72 countries.

On November 2015, Atos announced the project of acquisition of Unify, the number three world leader of integrated communication solutions. With this acquisition Atos intends to create a unique integrated proposition for unified communications and real time capabilities enhancing social collaboration, digital transformation, and business performance of its clients.


As of February 1st, 2016, Atos completes the acquisition of Unify from Gores Group and Siemens, creating a unique integrated proposition for unified communications to improve business performance and support digital transformation. The Services activity of Unify (c. € 0.4 billion annual revenue) is integrated in the Atos Service Line “Managed Services”.


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